Heroku outage history

Impact began at 1:31 PM UTC with intermittent loss of application logs for some Heroku Common Runtime customers in the US region. In a subset of US regions, router logs were dropped while app logs remained available, causing degraded observability for affected apps and workflows. The issue persisted for about three hours as engineers investigated and worked to restore normal log delivery.

By 4:16 PM UTC engineers had fixed the underlying fault and began monitoring, with full restoration of log delivery by 4:31 PM UTC. The incident was confined to US regions and affected log routes rather than overall app availability.

An EU-region issue affected Heroku's Common Runtime apps when a security update unintentionally tightened TLS certificate policy for app default domains (<app>.herokuapp.com). This caused TLS handshake failures and prevented some clients from connecting to apps. The impact began at 3:06 PM UTC and degraded access for about an hour as engineers worked on remediation. Engineers subsequently identified the policy regression and moved to remediate it, with changes taking effect around 4:11 PM UTC and full recovery by 4:16 PM UTC.

An incident affected Heroku Apps, causing partial degradation of app functionality for hosted projects. The issue began at Aug 10, 2026 3:26 PM UTC when Heroku flagged a feature degradation and said engineers were investigating. The disruption lasted about 30 minutes and was resolved by 3:56 PM UTC as services returned to normal and app behavior stabilized. The status updates described the event as a feature degradation and confirmed that the engineering team was actively working on root cause and remediation.

During the incident, Heroku provided updates noting the degraded feature within the Apps component, and later stated the issue had been resolved and systems were operating normally again. The impact appeared limited to applications relying on the affected feature, with users likely noticing intermittent or degraded functionality during the window.

A disruption affected Cedar Private Spaces apps hosted in Virginia, where users experienced failures when starting and scaling dynos. The disruption began at 1:41 PM UTC as Heroku noted engineers were investigating.

At 2:01 PM UTC, engineers identified an upstream service provider issue that was impacting Cedar Private Spaces in Virginia. They were working with the upstream provider to expedite a resolution. A follow-up at 2:16 PM UTC indicated some service recovery had been observed and that teams were monitoring for full resolution.

Finally, the status was updated to indicate recovery as services returned to normal by 2:36 PM UTC. The impact appeared regional to Virginia, with no widespread outages reported.

The incident impacted Heroku's Apps and Data components, likely causing interruptions for users attempting to run apps or access data. The outage began at Feb 18, 2026 1:51 AM UTC and was resolved by Feb 18, 2026 3:11 AM UTC, lasting about 1 hour and 20 minutes.

Heroku's status page documented two updates during the event. The initial update at Feb 18, 2026 1:51 AM UTC noted a service disruption and that engineers were investigating. A follow-up update at Feb 18, 2026 3:11 AM UTC indicated recovery, with the Apps and Data components returning to normal. The incident involved two components and was resolved without extended regional impact.

User reports were limited, reflecting a relatively contained issue. Overall, the outage status progressed from a disruption to normal service within the 1 hour 20 minute window.

The Heroku Tools component experienced a feature disruption that caused API access and dashboard/deployments issues for users. The outage lasted about 1 hour and 15 minutes, beginning when the status page moved from up to warn at Jan 15, 2026 12:46 PM UTC and ending when it returned to up at Jan 15, 2026 2:01 PM UTC. The incident was publicly described as a feature disruption affecting the Tools component during investigations by Heroku engineers.

Heroku published two status updates during the incident to communicate investigation progress and restoration. User reports came from multiple regions, including Brazil, Kenya, Pakistan, Poland, France, and the United States, indicating broadly distributed impact on APIs, deployments, and dashboard access. The Tools component subsequently returned to normal operation as the issue was resolved.

StatusGator detected login and CLI access issues for Heroku at Jan 15, 2026 12:25 PM UTC, about 21 minutes before the official acknowledgement at 12:46 PM UTC. The early warning ended at 1:25 PM UTC. The disruption affected the Tools component and impacted users globally, hindering login, API use, CLI commands, and dashboard access. The first official update appeared at 12:46 PM UTC indicating engineers were investigating and that the Tools component had degraded. The incident was resolved by 2:01 PM UTC when the Tools component returned to up, signaling recovery. The provider issued 2 status updates during the incident.

An outage affected the Heroku platform and multiple Salesforce cloud services, including Commerce Cloud, Core services, Hyperforce, MuleSoft, Marketing Cloud, Slack, and Tableau. The disruption impacted app hosting, data processing, and integrations for many customers. The outage began on Oct 20, 2025 8:49 AM UTC and was resolved by Oct 21, 2025 4:16 AM UTC, lasting about 19 hours and 27 minutes. Affected components included Tools, Data, and Apps.

Salesforce's status updates indicated the issue was triggered by a third-party vendor, with engineers working to resolve the disruption. The provider issued three official updates during the incident before restoration, noting ongoing remediation and eventual recovery.

Heroku reported an outage impacting the Apps component of the platform due to elevated H99 errors in the runtime, affecting users in the US and EU. The issue began at 11:17 PM UTC and resulted in applications failing to start or respond in those regions.

Status updates documented the incident: The first update at Sep 25, 2025 1:11 AM UTC indicated investigation into elevated H99 errors. A subsequent update at Sep 25, 2025 2:16 AM UTC showed the Apps component had recovered, returning to a normal state. The outage lasted roughly 2 hours and 59 minutes.

The Heroku Apps component experienced an outage starting at Sep 24, 2025 11:40 PM UTC with elevated H99 errors affecting US and EU regions, causing downtime for user applications. The Apps component was later reported down from Sep 25, 2025 12:11 AM UTC and was restored by Sep 25, 2025 1:01 AM UTC as engineers worked to resolve the issue. The outage lasted about 1 hour and 21 minutes and affected users across two regions.